Improvement in key-guards



atw ditaa MAX E. BEROLZHEIMER, OF NEW YORK, N. Y.

Letters Patent No. 98,736,

dated January 11, 1870.

IMPROVEMENT IN KEY-GUARDS).

T116 Scheule reen'ed to in these Letters Patent: and making part Of thesame 'To all whom it 'may concem Be it known that I, MAX E. BEOLZHEIMER,of

the city, county, andState of New York, have'inx'ented a new and usefulvImprovement in Locks and I hereby declare that the following is a full,clear, and exact description therof, reference being had' to theaccompanyingdrawings, making a `part of this specification, and theletters of reference marked thereon, in which t-he same letterrepresents the same' thing in each figure.

Figure 1 is a front view of the face of a lock, showing my improved`double ratchet-catch and key-hole guard, in position.

Figure 2, the same, but not in position.

Fignre 3, a side view of the pinion-key.

The purpose of my invention is to providea simple,

cheap. secure, and splingless means of confining a hole guard, nor of ahook or button to secure the locked bolt, so that the key cannot beturned, and the key-hole shall, at the same time, be guarded against theinseiftionof an instrument from Without, and consists in theconstruction and arrangemen'tof 'a pawl that shall lock, at the sametime, both the key and the knob-shank spindle, in the manuer I Will nowde? scribe.

A is the double catch.

B and B', the upper and lower buttous.

O, the slot, in which the lower button Works.

D, the key-hole guard. E, the key-hole.

F, the pinionon the key.

G, the ratchets.

H, the pivot, on which the catch turns.

I, the ratcheted shank of the knob.

J, the pivot, on which the lower button turns.

The operation of these parts-is as follows: rl`he bolt, having beenshot, turn catch A upon its pivot H, so that its upper ratchet-tceth, G,catch in` pinion F, of the key, and its lower ratchet-teeth, G, in theteeth of .the knoh-shank I, and secure the catch, bybringing upperbutton B into place against the end the catch, and turning lower buttonB' int-o slot C, of when its hooked end will catch under the face-plateand hold key-hole guardl D, thus brought over keyhole E, firnily andsecurely in place; neither bolt of the lock can now be thrown back, norcanl the key or knob be turned, nor can a wire or other instrument beinserted to displace. the catch. Either button would Vbe sufficient, butthe two give great security, the lower one, especially, againstpressure, to force the key-hole guard out of place.

I do not claim being first inventor of a sliding keysame, nor offastening both key and spindle D; I am also aware that a ratchet hasbeen before made on the shank of the key, and stopped, by. means of apawl attached to the face-plate of the lock. These, therefore, I do notclaim; but

What Iclaim, and desire to secure by Letters Patent, isi key-hole guardand double rat-chet-guard, fastened and secured substantially asdescribed, and constructed on a pivoted lever, to lock the key andknobshank, and secure the key-hole, in the manner and for the purposespecified. w MAX E. BEROLZHEIMER. Witnesses:

WM. F. WILLIs,

S. I. GoRDoN.

